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Finding the Fourth Proportional to 159,172.38, 219,689.09 and 91,234.90

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Solution

The fourth proportional to 159,172.38, 219,689.09 and 91,234.90 is: 125,922.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,172.38 : 219,689.09 = 91,234.90 : x
  2. Step 2: Convert to fraction form
    159,172.38/219,689.09 = 91,234.90/x
  3. Step 3: Cross multiply
    159,172.38x = 219,689.09 × 91,234.90
  4. Step 4: Simplify right side
    159,172.38x = 20,043,312,157.24
  5. Step 5: Solve for x
    x = 20,043,312,157.24/159,172.38
  6. Step 6: Final answer
    x = 125,922.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.